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Note 4 - Accounts Receivable - Summary of Accounts Receivable (Details) - USD ($)
Mar. 31, 2023
Dec. 31, 2022
Accounts receivable $ 3,985,988 $ 2,096,569
Allowance for doubtful accounts (623,785) (573,785)
Accounts receivable, net of allowances for doubtful accounts $ 3,362,203 $ 1,522,784